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Linux Find Out CPU Architecture Information

  • Tapas Mallick June 7, 2011, 11:38 am

    is “lscpu” available for redhat and its variants ? It is really a cool command/tool to have with all Linux System Administrator.

    • Philippe Petrinko June 7, 2011, 12:53 pm


      If [lscpu] does not exist for your distribution, you can always create a shell alias to create a shortcut of the following command

      alias lscpu=”/bin/cat /proc/cpuinfo|/bin/grep -E ‘processor|model name|cache size|core|sibling|physical'”

      Then afterwards, you can use this command anywhere.
      Just add it to your personal Bash customization startup file, located into your home directory, namely [ ~/.bashrc ] or sometimes specific included file [ ~/.bash-aliases ].

      Have fun !

      • Tryme June 7, 2011, 1:22 pm


        Useless use of cat???

        alias lscpu=”/bin/grep -E 'processor|model name|cache size|core|sibling|physical' /proc/cpuinfo”


        lscpu command available on latest version of Ubuntu, Debian, RHEL 6 and above.

  • Philippe Petrinko June 7, 2011, 3:02 pm

    “Useless use of cat?”

    Yeah, quite right, of course.

    alias lscpu=’/bin/grep -E “processor|model name|cache size|core|sibling|physical” /proc/cpuinfo’

    This will do the trick!

    • Tapas Mallick June 8, 2011, 7:11 am

      Appreciate your comment, but a vanilla grepping of /proc/cpuinfo with specified fields are not enough to get lscpu like detailed output. Its lacking of “Number of Physical CPU, Core per CPU, Threads in each Core, L1/D1/D3 Cache size, CPU Mode, Virtualization Technology Used, NUMA Node ID”. Of course bit sophisticated grepping/sorting/uniq on /proc/cpuinfo with generate the required output, still precompiled version of lscpu will be a great add-on for systemadmins.

  • vijay gupta June 9, 2011, 10:52 am

    Really helpful commands.

  • david June 23, 2011, 3:26 am

    thankz for the article…i was searching for this…

  • eepeesalimep December 26, 2011, 6:17 am


    how we can check processor types like (dual core ,quadcore ) in linux mechine
    suppose my cpuimfo out put like Intel Xeon(R) CPUX5355 @ 2.66GHz how i know this is dualcore or quad core processor ?

  • Gorth Durak July 18, 2012, 2:52 am

    as a c++ guy, I’m trying to get my barecomputer_o (Vettrasoft Z Directory object)
    working on Debian linux – is there a [c function] OS API to get CPU info? I can
    fork()/exec() or do system(“lscpu > /tmp/somefile”) and do a bunch fo grunt
    Quick&Dirty hacking, not elegant
    In microsoft-land, I use a combo of __cpuid (CPUInfo, 0); and embedded assembler,

    #if zos_MSWindows
            mov     eax,    1
            mov     EAXBuf, eax     // version
            mov     EBXBuf, ebx     // brand idx, max # CPUs
            mov     ECXBuf, ecx     // extended feature info
            mov     EDXBuf, edx     // feature info
        m_SteppingID = EAXBuf & 0x0000000F;
        m_Model      = EAXBuf & 0x000000F0;
        m_FamilyID   = EAXBuf & 0x00000F00;
        m_Model    >>= 4;
        m_FamilyID >>= 8;
        // etc etc.
  • Babin Lonston October 19, 2013, 10:37 am

    Its cant Editable Proc will get created while the system boots every time in RAM , U can create it manually if your Root User

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